升降气袋

例句：

1. 1. The elevator is designed to safely transport people up and down the building.
   电梯被设计用来安全地在大楼上下运送人员。
2. 2. The lift is a convenient way to move between floors without having to climb stairs.
   电梯是一种方便的移动方式，无需爬楼梯即可在楼层之间穿梭。
3. 3. The lift was out of order, so we had to wait for another one to arrive.
   电梯出了故障，所以我们不得不等待另一辆电梯的到来。